This is the kind of thing that you can really overthink. I would just say it is whatever people call it.
Most people would intuitively say "invent" rather than "discover" so that's what it is. Words are defined by their usage. If that results in a strange and unsatisfying definition then so be it.
Most people would intuitively say "invent" rather than "discover" so that's what it is. Words are defined by their usage. If that results in a strange and unsatisfying definition then so be it.